This study examines the effect of pregnancy on fetal outcome and maternal renal function in 17 women with Type 1 diabetes mellitus and nephropathy attending a joint diabetic-antenatal clinic between 1985 and 1993. There were 7 successful pregnancies in 6 women with moderate renal impairment, mean pre-pregnancy serum creatinine 165 mumol l-1 (Group 1), and 12 in 11 women with proteinuria and preserved renal function (Group 2). Median gestation of pregnancy was 31 + 3 weeks in Group 1 and 36 + 4 weeks in Group 2 (p < 0.05). All babies in Group 1 required neonatal intensive care for a median of 19 days (range 8-271) as compared to only 5 of 13 in Group 2 whose median stay was 13 (7-17) days (p < 0.05). There was one late death in Group 1. Longitudinal creatinine data in those with moderate renal impairment suggest no systematic adverse long-term effect of pregnancy on maternal renal function, although differing changes in renal function were observed during pregnancy. The generally favourable outcome achieved relied heavily upon neonatal care expertise.
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Mackie et al. (1996) studied this question.